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Cadillac Repair/91 cadillac seville wiring problem

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Expert: - 9/9/2009


Question
i have a 91 cadillac seville and i beleave i have a wiring problem... im not a mechanic but i do have basic auto knowledge. i bought the car with the power locks not working. the horn either. now the light go on and off as they please and interior lights stopped working. trunk release button has also started to work only when it wants... how bad is this???

Answer
Hello,

The locks and dome are commonly on the same circuit, so you might only need a fuse. The trunk release however is on a switched circuit in which ignition has to be on in order to operate.

Look at your owners manual to determine how many fuse boxes are in the car and the location of the lock fuse.

You ask me how bad is this? I have no way of knowing without being at the car.

In the event that the problem is not a fuse, you will need to go deeper. I do have a Mitchell repair manual for a 1991 Cadillac and other vehicles I can sell. Most of the information can be understood by a layman. This has all the wiring schematics for your car and the trouble shooting as well.

If you feel you might be interested in this very extensive manual, contact me at robo14@aol.com

Rob

Cadillac Repair

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Rob Painter

Expertise

Alarm system questions cannot be answered on this forum. These systems are not what I can answer. Without being physically at the vehicle and not knowing what kind of electrical service has been done on the vehicle, there is no possible way to give an accurate answer over the internet. My expertise is in Ignition/key based anti-theft systems. These issues include GM VATS (resistor chip in key blade) PASSLOCK (MRD)-ignition lock rotation based, no special ignition key and the PKIII Transponder (computer chip in key) systems. These systems are not alarm based and are integral with the starting of the engine. This is why I cannot diagnose alarm problems without physically looking at the vehicle: Alarm systems are a completely different annimal than ignition key/lock based anti-theft system. Many alarm questions come from vehicles 10 years old, and since older, many hands that had been involved over the years.I am an expert in all GM factory (ignition/key based)systems. Alarm system questions pose to many situations beyond my knowledge as to what has been done to the vehicle over the years. Some guy may have actually wired the stereo into the alarm system. Who knows? Over my past 30 years in vehicle wiring repair, I have seen unbelievable wiring disaters done by guys that consider themselves "mechanics." I have seen stereos and alarms intalled using surgical tape. I have seen modules burn up, un-fused circuits, wiring jambed between the doors and even lamp cord used for a starter kill. To answer alarm questions over the internet without examining the vehicle is like asking; What does it take to remove a dent?

Experience

Education/Credentials-ASE certified. 11 years with a GM dealer and 17 years with a repair facility dealing with only the repair of theft recovered vehicles.

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